Factual error: During the scene where Don Draper is having an "intimate moment" with Ms. Goldberg on the roof of the Menkens store, crickets are audibly present. Crickets are not present in appreciable numbers on a Manhattan rooftop to produce a sound loud enough to drown out traffic and other ambient noise on 5th Ave. Furthermore, the sound of the crickets is inconsistent with that produced by the native snowy tree cricket."Crickets chirp at different rates depending on their species and the temperature of their environment. Most species chirp at higher rates the higher the temperature is (approximately 62 chirps a minute at 13°C in one common species; each species has its own rate). The relationship between temperature and the rate of chirping is known as Dolbear's Law. Using this law it is possible to calculate the temperature in Fahrenheit by adding 40 to the number of chirps produced in 14 seconds by the snowy tree cricket common in the United States." (http://en.wikipedia.org/wiki/Cricket_(insect))

When Christina Hendricks is about to leave the office, while talking to Don, she is wearing a scarf on her hair. The scarf corner is alternatively tucked in her coat collar and then outside, and inside again etc. in alternate angle shots of the scene.

The character Ted Chaough is briefly heard ordering an "Old Spanish" at a bar during the episode. This is a very quick and subtle reference to the popular cult-comedy series "30 Rock." In "30 Rock", the "Old Spanish" is a fake drink that character Cooter Burger is jokingly convinced is real as a prank by co-workers at the White House. The drink was rather nauseatingly comprised of red wine, tonic water and olives. "Mad Men" star Jon Hamm had previously co-starred on "30 Rock" and is friendly with its creator Tina Fey, thus the reference.